Fin Heat Sink with Improved Structure and Processing Method Thereof

ABSTRACT

The invention relates to the technical field of heat sinks, in particular to a fin heat sink with an improved structure and a processing method thereof. The fin heat sink with the improved structure comprises a pedestal and a plurality of cooling fins, wherein roots of the cooling fins are connected with the pedestal and provided with clamping grooves the bottoms of which are opened; clamping pieces corresponding to the clamping grooves are extended out of the pedestal; the cooling fins are clamped and connected with the clamping pieces through the clamping grooves; and the plurality of the cooling fins are subjected to layered arrangement to form a cooling fin group. The clamping grooves at the roots of the cooling fins are easy to mold through a die; the clamping pieces extended out of the pedestal are simple and convenient to process; the clamping grooves are connected with the clamping pieces by means of clamping, so the connection between the clamping grooves and the clamping pieces is reliable; and the clamping process can be completed through a stamping die. Therefore, compared with the prior art, the fin heat sink with the improved structure and the processing method thereof, which are provided by the invention, overcome the technical prejudice and can greatly reduce the processes, reduce the production cost and improve the production efficiency.

FIELD OF THE INVENTION

The invention relates to the technical field of heat sinks, in particular to a fin heat sink with an improved structure and a processing method thereof.

BACKGROUND OF THE INVENTION

With the development of the technology, the size of electronic products is smaller and smaller, and correspondingly the heat productivity of unit space is higher and higher. Therefore, higher requirement on heat dissipation is required to be met. Heat sinks have become essential accessories of certain electronic products. A commonly used heat sink mainly comprises a pedestal and a plurality of fin groups with the functions of heat transfer and dissipation, wherein each fin group comprises a plurality of fins subjected to layered arrangement, and the heat sink can also be provided with a heat pipe to enhance the cooling effect.

The contact area between the fins and the pedestal and whether the fins and the pedestal are firmly connected with each other are important factors affecting the cooling efficiency of the heat sink. Enabling the fins to be connected with the pedestal is a key step in the production process of the heat sink. A common method is to enable the fins to be connected with the pedestal by welding, in which a solder paste or other soldering pastes are required to be taken as a welding medium, and nickel plating processing is sometimes required to be performed based on the materials of the fins and the pedestal. For example, the Chinese invention patent application, with the Application No. “200410003352.9” and the invention title “METHOD FOR PREPARING HEAT SINK BY WELDING”, discloses a method for connecting fins and a pedestal by welding.

The above welding method has the disadvantages of complex process, high cost, low production efficiency and environment-unfriendly property. Therefore, another common method is to improve the structure of the pedestal and the fins and enable the fins to be connected with the pedestal by embedding, riveting or other mechanical connection means. For example, the Chinese utility model patent with the patent No. “03279661.7” and the patent title “HEAT SINK STRUCTURE”, the Chinese utility model patent with the patent No. “200620063119.4” and the patent title “IMPROVED ASSEMBLY OF FINS AND PEDESTAL FOR HEAT SINK”, and the like. The method is to arrange various independent fins in succession into the pedestal which is provided with grooves in advance, apply a die to extrude the grooves to enable the grooves to be deformed, and enable flaky roots of the fins and the deformed grooves to form interference fit, so as to enable the fins to be fixedly connected with the pedestal. The process has the disadvantages that: not only the grooves are difficult to process but also the process for extruding the grooves through the die is inconvenient and time-consuming and has high defective rate due to small gaps between the fins. Therefore, although the method has certain advantages compared with the method for preparing the heat sink by welding, the method has the disadvantages of complex process, inconvenient processing and high cost. Moreover, the contact area between the flaky roots of the fins and the pedestal is limited so as to affect the heat transfer efficiency.

SUMMARY OF THE INVENTION

The invention aims to provide a fin heat sink with an improved structure and a processing method thereof for overcoming the defects in the prior art. The fin heat sink with the improved structure has the advantages of scientific structure, low production cost and high production efficiency.

In order to achieve the aim, the invention provides a fin heat sink with an improved structure, which comprises a pedestal and a plurality of cooling fins, wherein roots of the cooling fins are connected with the pedestal and provided with clamping grooves the bottoms of which are opened; clamping pieces corresponding to the clamping grooves are extended out of the pedestal; the cooling fins are clamped and connected with the clamping pieces through the clamping grooves; and the plurality of the cooling fins are subjected to layered arrangement to form a cooling fin group.

The clamping groove comprise a clamping and connecting groove and a connecting groove which are communicated with each other, wherein the connecting groove is close to the pedestal; and the maximum width of the clamping and connecting groove is more than the minimum width of the connecting groove.

One end of the clamping groove close to the roots of the cooling fins is rectangular and the other end of the clamping groove is circular or rectangular.

The clamping groove is in the shape of a trapezoid, and one end of the clamping groove close to the roots of the cooling fins is a short bottom edge of the trapezoid.

The number of the clamping grooves is at least two; the clamping grooves are rectangular; and side faces of different clamping grooves are nonparallel to each other.

Clamps are extended out of one sides of the clamping grooves and sleeved with the clamping pieces; and the height of the clamps is equal to or less than the distance between adjacent cooling fins.

The fin heat sink is further provided with a heat pipe, wherein one end of the heat pipe passes through the cooling fin group and the other end of the heat pipe is connected with the pedestal.

The cooling fins are provided with bending parts the bending width of which is equal to the distance between the adjacent cooling fins.

Fastening pieces sleeved with the heat pipe are molded at joints of the cooling fins and the heat pipe.

The invention also provides a method for processing the fin heat sink, which comprises the following steps of:

-   (1) preparing a pedestal, in which the pedestal is connected with     convex clamping pieces which are arranged on cooling end faces of     cooling fins, and the clamping pieces are extended along straight     lines parallel to the cooling end faces; -   (2) stamping the cooling fins and preparing the cooling fins through     a stamping die, in which clamping grooves the bottoms of which are     opened are stamped and molded at roots of the cooling fins and     clamped and connected with the clamping pieces of the pedestal; and -   (3) performing assembly, in which the plurality of the cooling fins     are clamped and connected with the clamping pieces through the     clamping grooves in succession.

The stamping die is a progressive die; the prepared pedestal is arranged inside a lower die of the progressive die; the extension direction of the clamping pieces is consistent with the stamping direction of a punch press; and the progressive die stamps down the stamped and molded cooling fins to enable the cooling fins to be sleeved with the clamping pieces through the clamping grooves.

The fin heat sink comprises a heat pipe which is “U”-shaped; the heat pipe and the prepared pedestal are arranged inside the lower die of the progressive die together; one end of the heat pipe is vertical; and the cooling fins are sleeved with the heat pipe through the punch press.

The pedestal is molded by a process of extruding, casting or cutting.

The clamping pieces and the pedestal are integrated into a whole.

The clamping pieces and the pedestal are separable; the pedestal is provided with grooves; and roots of the clamping pieces are connected with the pedestal through the grooves.

The clamping grooves are provided with clamps through stamping molding; and the clamps are in tight fit with the clamping pieces.

Fastening pieces are stamped and molded in sleeved positions of the cooling fins and the heat pipe and sleeved with the heat pipe.

The cooling fins are provided with bending parts by stamping.

The heat sink provided by the invention has the advantages that: the heat sink comprises a pedestal and a plurality of cooling fins, wherein roots of the cooling fins are connected with the pedestal and provided with clamping grooves the bottoms of which are opened; clamping pieces corresponding to the clamping grooves are extended out of the pedestal; the cooling fins are clamped and connected with the clamping pieces through the clamping grooves; and the plurality of the cooling fins are subjected to layered arrangement to form a cooling fin group. The clamping grooves at the roots of the cooling fins are easy to mold through a die; the clamping pieces extended out of the pedestal are simple and convenient to process; the clamping grooves are connected with the clamping pieces by means of clamping, so the connection between the clamping grooves and the clamping pieces is reliable; and the clamping process can be completed through a stamping die. Therefore, compared with the prior art, the fin heat sink provided by the invention overcomes the technical prejudice and can greatly reduce the processes, reduce the production cost and improve the production efficiency.

The processing method provided by the invention has the advantages that: the processing method comprises the following steps of: (1) preparing a pedestal, in which the pedestal is connected with convex clamping pieces which are arranged on cooling end faces of cooling fins, and the clamping pieces are extended along straight lines parallel to the cooling end faces; (2) stamping the cooling fins and preparing the cooling fins through a stamping die, in which clamping grooves the bottoms of which are opened are stamped and molded at roots of the cooling fins and clamped and connected with the clamping pieces of the pedestal; and (3) performing assembly, in which the plurality of the cooling fins are clamped and connected with the clamping pieces through the clamping grooves in succession. The processing process can be completed through the die; the processing speed is fast; the assembly of the cooling fins and the pedestal is convenient; and the cooling fins and the pedestal do not require welding. Therefore, compared with the prior art, the processing method provided by the invention overcomes the technical prejudice and can greatly reduce the processes, reduce the production cost and improve the production efficiency.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a structure diagram of a fin heat sink embodiment 1 for a fin heat sink with an improved structure;

FIG. 2 is a decomposition diagram of the fin heat sink embodiment 1 for the fin heat sink with the improved structure;

FIG. 3 is a structure diagram of a preferred embodiment for a clamping groove of a cooling fin for the fin heat sink with the improved structure;

FIG. 4 is a schematic diagram of the front side of the FIG. 3;

FIG. 5 is a structure diagram of a second embodiment for the clamping groove of a cooling fin for the fin heat sink with the improved structure;

FIG. 6 is a structure diagram of a third embodiment for the clamping groove of a cooling fin for the fin heat sink with the improved structure;

FIG. 7 is a structure diagram of a fourth embodiment for the clamping groove of a cooling fin for the fin heat sink with the improved structure;

FIG. 8 is a structure diagram of a fifth embodiment for the clamping groove of a cooling fin for the fin heat sink with the improved structure;

FIG. 9 is a structure diagram of a sixth embodiment for the clamping groove of a cooling fin for the fin heat sink with the improved structure;

FIG. 10 is a structure diagram of a seventh embodiment for the clamping groove of a cooling fin for the fin heat sink with the improved structure;

FIG. 11 is a structure diagram of a fin heat sink embodiment 2 for the fin heat sink with the improved structure;

FIG. 12 is a structure diagram of a cooling fin of the fin heat sink embodiment 2 for the fin heat sink with the improved structure;

FIG. 13 is a structure diagram of a stamping process of a method for processing the fin heat sink;

FIG. 14 is a structure diagram of a preferred embodiment for a cooling fin processed by the method for processing the fin heat sink;

FIG. 15 is a structure diagram of a preferred embodiment for a pedestal processed by the method for processing the fin heat sink;

FIG. 16 is a schematic diagram of a heat sink assembly process of the method for processing the fin heat sink;

FIG. 17 is a structure diagram of a heat sink (after assembly) processed by the method for processing the fin heat sink;

FIG. 18 is a structure diagram of another embodiment of the heat sink processed by the method for processing the fin heat sink; and

FIG. 19 is a decomposition diagram of the heat sink illustrated in FIG. 18.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

The drawings are attached to provide further description of the invention.

Embodiment 1

As illustrated in FIGS. 1 to 3, the fin heat sink with the improved structure, provided by the invention, comprises a pedestal 1 and a plurality of cooling fins 2, wherein roots of the cooling fins 2 are connected with the pedestal 1 and provided with clamping grooves 21 the bottoms of which are opened. As illustrated in FIG. 3, one end of the clamping groove close to the roots of the cooling fins 2 is in the shape of a rectangle and the other end of the clamping groove is in the shape of a circle, and the diameter of the circle is more than the width of the rectangle; a clamping piece 11 corresponding to the clamping groove 21 is extended out of the pedestal 1; the cooling fins 2 are stamped to enable the clamping groove 21 to pass through the clamping piece 11; the cooling fins 2 are clamped and connected with the clamping piece 11 through the clamping groove 21; the cooling fins and the pedestal 1 are firmly connected with each other due to the clamping groove 21; and the plurality of the cooling fins 2 are subjected to layered arrangement to form a cooling fin group 3.

Two methods are mainly provided for connecting the cooling fins 2 and the pedestal 1 in the prior art. One method is as follows: the cooling fins 2 are connected with the pedestal 1 by means of welding; a welding part is required to be subjected to nickel plating processing in the process; a solder paste is required to be used in the welding process; and the welding process is complex so that the quality is difficult to guarantee. The other method is as follows: a plurality of grooves are arranged on the pedestal 1 and connected with the cooling fins 2 after the grooves are extruded and deformed. The process has the disadvantages of inconvenient processing and low production efficiency. The fin heat sink with the improved structure, provided by the invention, improves the method for connecting the cooling fins 2 and the pedestal 1. During the processing, the clamping grooves 21 at the roots of the cooling fins 2 are easy to mold through the die; the clamping pieces 11 extended out of the pedestal are simple and convenient to process; the clamping grooves 21 are connected with the clamping pieces 11 by means of clamping, so that the connection between the clamping grooves 21 and the clamping pieces 11 is reliable; and the clamping process can be completed through the stamping die. Therefore, the fin heat sink with the improved structure, provided by the invention, overcomes the technical prejudice, and can greatly reduce the processes, reduce the production cost and improve the production efficiency when the fin heat sink provided by the invention is processed.

Moreover, as illustrated in FIG. 3, a clamp 22 is extended out of one side of the clamping groove 21; when the cooling fins 2 are stamped to the pedestal 1, the clamp 22 is molded through a die; the clamp 22 is sleeved with the clamping piece 11; and the height of the clamp 22 is equal to or less than the distance between adjacent cooling fins 2. Due to the clamp 22, the contact area between the pedestal 1 and the cooling fins 2 is increased, thereby not only the pedestal 1 and the cooling fins 2 are more firmly connected with each other but also the heat transfer area is increased so that the heat dissipation is enhanced.

Furthermore, as illustrated in FIGS. 1 and 2, the embodiment is also provided with a heat pipe 4; and one end of the heat pipe 4 passes through the cooling fin group 3 and the other end of the heat pipe 4 is connected with the pedestal 1.

In order to control the distance between the cooling fins 2, as illustrated in FIG. 3, the cooling fins 2 are provided with bending parts 23. Each cooling fin 2 is provided with a plurality of bending parts 23 the bending width of which is equal to the distance between the adjacent cooling fins 2.

In order to enhance the heat dissipation of the heat pipe 4, fastening pieces 24 sleeved with the heat pipe 4 are molded at joints of the cooling fins 2 and the heat pipe 4. The fastening pieces 24 are similar to the clamps 22 and also have the functions of fixing and heat dissipation enhancement.

The clamping groove 21 illustrated in the invention has the function of enabling the cooling fins 2 to be clamped and connected with the pedestal 1. A plurality of embodiments are feasible. FIGS. 1 to 4 illustrate preferred embodiments of the clamping groove 21, and FIGS. 5 to 10 illustrate other embodiments of the clamping groove 21.

When the number of the clamping groove 21 is only one, the clamping groove 21 comprises a clamping and connecting groove and a connecting groove which are communicated with each other, wherein the connecting groove is close to the pedestal 1 and the maximum width of the clamping and connecting groove is more than the minimum width of the connecting groove, so that the clamping piece 11 can be effectively clamped and connected into the clamping groove 21. Of course, the number of the clamping grooves 21 can be increased. As illustrated in FIG. 5, one end of the clamping groove 21 close to the roots of the cooling fins 2 is in the shape of a rectangle and the other end of the clamping groove 21 is in the shape of a rectangle with larger width. As illustrated in FIG. 6, the clamping groove 21 is in the shape of a trapezoid, and one end of the clamping groove 21 close to the roots of the cooling fins 2 is a short bottom edge of the trapezoid. As illustrated in FIG. 7, the clamping groove 21 is “cross-shaped”. What needs to be specified is that: as illustrated in FIG. 8, the clamping groove 21 can also be in the shape of a curve with radian, in which case the clamping effect can also be achieved.

When the number of the clamping grooves 21 is more than one, other embodiments are also feasible. As illustrated in FIG. 9, the clamping grooves 21 are rectangular; the number of the clamping grooves 21 is two; and side faces of the two clamping grooves 21 are nonparallel to each other.

The cross section of the pedestal can also be in the shape other than rectangle. When the cross section of the pedestal is cambered as illustrated in FIG. 10, the cooling fins 2 are provided with two clamping grooves 21 perpendicular to the pedestal.

Embodiment 2

A plurality of clamping grooves 21 can be assembled for use, so as to improve the embodiment 1. As illustrated in FIGS. 11 and 12, the cooling fins 2 are provided with a large clamping groove 21 and three small clamping grooves 21. Due to the arrangement of a plurality of the clamping grooves 21, the contact area between the cooling fins 2 and the pedestal 1 is larger. Consequently, the heat dissipation can be enhanced. Other parts of the embodiment are similar to those of the embodiment 1.

The method for processing the fin heat sink, provided by the invention, comprises the following steps of:

-   (1) preparing the pedestal 1, in which the pedestal 1 is connected     with convex clamping pieces 11 which are arranged on cooling end     faces of the cooling fins 2, and the clamping pieces 11 are extended     along straight lines parallel to the cooling end faces; -   (2) stamping the cooling fins 2 and preparing the cooling fins 2     through a stamping die, in which clamping grooves 21 the bottoms of     which are opened are stamped and molded at roots of the cooling fins     2 and clamped and connected with the clamping pieces 11 of the     pedestal 1; and -   (3) performing assembly, in which the plurality of the cooling fins     2 are clamped and connected with the clamping pieces 11 through the     clamping grooves 21 in succession.

More preferably, as illustrated in FIG. 1, the steps (2) and (3) can be completed on the same station. More specifically, the stamping die is a progressive die 5; the prepared pedestal 1 is arranged inside a lower die of the progressive die 5; the extension direction of the clamping pieces 11 is consistent with the stamping direction of a punch press; and the progressive die 5 stamps down the stamped and molded cooling fins 2 to enable the cooling fins 2 to be sleeved with the clamping pieces 11 through the clamping grooves 21.

Two methods are mainly provided for connecting the cooling fins 2 and the pedestal 1 in the prior art. One method is as follows: the cooling fins 2 are connected with the pedestal 1 by means of welding; a welding part is required to be subjected to nickel plating processing in the process; a solder paste is required to be used in the welding process; and the welding process is complex so that the quality is difficult to guarantee. The other method is as follows: a plurality of grooves are arranged on the pedestal 1 and connected with the cooling fins 2 after the grooves are extruded and deformed. The process has the disadvantages of inconvenient processing and low production efficiency. As for the fin heat sink with the improved structure, provided by the invention, the cooling fins 2 are provided with the clamping grooves 21 through stamping molding; the pedestal 1 is provided with the clamping pieces 11; and the cooling fins 2 are clamped and connected to the pedestal 1 along the extension direction of the clamping pieces 11, and then the assembly of the heat sink can be completed. Therefore, the assembly process is very simple and convenient and can be further completed through the stamping die. The fin heat sink with the improved structure, provided by the invention, overcomes the technical prejudice, and the method provided by the invention can greatly reduce the processes, reduce the production cost and improve the production efficiency when the fin heat sink provided by the invention is processed by the method.

Moreover, as illustrated in FIG. 4, the fin heat sink comprises a heat pipe 4 which is “U”-shaped; the heat pipe 4 and the prepared pedestal 1 are arranged inside the lower die of the progressive die 5 together; one end of the heat pipe 4 is vertical; and the cooling fins 2 are enabled to be sleeved with the heat pipe 4 through the punch press.

The clamping grooves 21 illustrated in the invention have the function of enabling the cooling fins 2 to be clamped and connected with the pedestal 1. A plurality of embodiments are feasible. The FIG. 2 only illustrates the preferred embodiment, in which the requirement on the shape of the clamping grooves 21 is as follows: the number of the clamping grooves is at least two, and certain included angles are formed on different clamping grooves 21 so that the clamping grooves 21 can be clamped and connected with the clamping pieces 11; or the number of the clamping grooves 21 is at least one and the clamping groove 21 comprises a clamping and connecting groove and a connecting groove which are communicated with each other, wherein the connecting groove is close to the pedestal 1, and the maximum width of the clamping and connecting groove is more than the minimum width of the connecting groove.

The pedestal 1 can be subjected to machine shaping by extruding, casting, cutting or other machining means.

In the embodiment, as illustrated in FIG. 3, the clamping pieces 11 and the pedestal can be integrated into a whole by the above means. And the clamping pieces 11 and the pedestal 1 can be also arranged as separable; the pedestal 1 is provided with grooves; and roots of the clamping pieces 11 are connected with the pedestal through the grooves. Therefore, the pedestal can be conveniently replaced. Consequently, the processing method provided by the invention is convenient for producing heat sinks with a plurality of specifications.

Furthermore, the clamping grooves 21 are provided with clamps 22 through stamping molding; the clamps 22 are in tight fit with the clamping pieces 11; and the height of the clamps 22 is equal to or less than the distance between the adjacent cooling fins 2. Due to the arrangement of the clamps 22, the contact area between the pedestal 1 and the cooling fins 2 is increased, thereby not only the pedestal 1 and the cooling fins 2 are more firmly connected with each other but also the heat transfer area is increased so that the heat dissipation is enhanced.

Fastening pieces 24 are stamped and molded in sleeved positions of the cooling fins 2 and the heat pipe 4 and sleeved with the heat pipe 4. In order to enhance the heat dissipation of the heat pipe 4, the fastening pieces 24 sleeved with the heat pipe 4 are molded at joints of the cooling fins 2 and the heat pipe 4. The fastening pieces 24 are similar to the clamps 22 and also have the functions of fixing and heat dissipation enhancement.

In order to control the distance between the cooling fins 2, as illustrated in FIG. 3, the cooling fins 2 are provided with bending parts 23 the bending width of which is equal to the distance between the adjacent cooling fins 2.

FIG. 5 illustrates a fin heat sink processed by the method provided by the invention, wherein a plurality of cooling fins 2 are overlaid to form a cooling fin group 3.

What needs to be specified is that the fin heat sink processed by the method provided by the invention can adopt a plurality of structures. The fin heat sink as illustrated in FIGS. 6 and 7 can also be prepared by the method provided by the invention. The differences between the fin heat sink and products processed by the above embodiments are as follows: the cooling fins 2 are provided with a large clamping groove 21 and three small clamping grooves 21. Due to the arrangement of a plurality of the clamping grooves 21, the contact area between the cooling fins 2 and the pedestal 1 is larger. Consequently, the heat dissipation can be enhanced.

Finally, what needs to be specified is that: the above embodiments are only used for specifying the technical proposal of the invention and not for limiting the scope of protection of the invention. Although detailed description of the invention is given by reference to preferred embodiments, those of ordinary skill in the art shall understand that the technical proposal of the invention can be modified or equivalently replaced without giving up the essence and the scope of the technical proposal of the invention. 

1. A fin heat sink with an improved structure, comprising a pedestal (1) and a plurality of cooling fins (2), wherein roots of the cooling fins (2) connected with the pedestal (1) and provided with clamping grooves (21) the bottoms of which being opened; clamping pieces (11) corresponding to the clamping grooves (21) extended out of the pedestal (1); the cooling fins (2) clamped and connected with the clamping pieces (11) through the clamping grooves (21); and the plurality of the cooling fins (2) subjected to layered arrangement to form a cooling fin group (3).
 2. The fin heat sink with the improved structure according to claim 1, wherein the clamping groove (21) comprises a clamping and connecting groove and a connecting groove which are communicated with each other; the connecting groove is close to the pedestal (1); and the maximum width of the clamping and connecting groove is more than the minimum width of the connecting groove.
 3. The fin heat sink with the improved structure according to claim 2, wherein one end of the clamping groove (21) close to the cooling fins (2) is rectangular, and the other end of the clamping groove (21) is circular or rectangular.
 4. The fin heat sink with the improved structure according to claim 2, wherein the clamping groove (21) is in the shape of a trapezoid, and one end of the clamping groove (21) close to the cooling fins (2) is a short bottom edge of the trapezoid.
 5. The fin heat sink with the improved structure according to claim 1, wherein the number of the clamping grooves (21) is at least two.
 6. The fin heat sink with the improved structure according to claim 1, wherein the number of the clamping grooves (21) is at least two; the clamping grooves (21) are in the shape of rectangles; and side faces of different clamping grooves (21) are nonparallel to each other.
 7. The fin heat sink with the improved structure according to any one of claims 1 to 6, wherein clamps (22) are extended out of one sides of the clamping grooves (21) and sleeved with the clamping pieces (11); and the height of the clamps (22) is equal to or less than the distance between adjacent cooling fins (2).
 8. The fin heat sink with the improved structure according to claim 7, wherein the fin heat with the improved structure is further provided with a heat pipe (4); and one end of the heat pipe (4) passes through the cooling fin group (3) and the other end of the heat pipe (4) is connected with the pedestal (1).
 9. The fin heat sink with the improved structure according to claim 8, wherein the cooling fins (2) are provided with bending parts (23) the bending width of which is equal to the distance between the adjacent cooling fins (2).
 10. The fin heat sink with the improved structure according to claim 9, wherein fastening pieces (24) sleeved with the heat pipe (4) are molded at joints of the cooling fins (2) and the heat pipe (4).
 11. A method for processing the fin heat sink, comprising the following steps of: (1) preparing a pedestal, in which the pedestal is connected with convex clamping pieces which are arranged on cooling end faces of cooling fins, and the clamping pieces are extended along straight lines parallel to the cooling end faces; (2) stamping the cooling fins and preparing the cooling fins through a stamping die, in which clamping grooves the bottoms of which are opened are stamped and molded at roots of the cooling fins and clamped and connected with the clamping pieces of the pedestal; and (3) performing assembly, in which the plurality of the cooling fins are clamped and connected with the clamping pieces through the clamping grooves in succession.
 12. The method for processing the fin heat sink according to claim 11, wherein the stamping die is a progressive die; the prepared pedestal is arranged inside a lower die of the progressive die; the extension direction of the clamping pieces is consistent with the stamping direction of a punch press; and the progressive die stamps down the stamped and molded cooling fins to enable the cooling fins to be sleeved with the clamping pieces through the clamping grooves.
 13. The method for processing the fin heat sink according to claim 12, wherein the fin heat sink comprises a heat pipe which is “U”-shaped; the heat pipe and the prepared pedestal are arranged inside the lower die of the progressive die together; one end of the heat pipe is vertical; and the cooling fins are sleeved with the heat pipe through the punch press.
 14. The method for processing the fin heat sink according to claim 13, wherein the pedestal is molded by a process of extruding, casting or cutting.
 15. The method for processing the fin heat sink according to claim 11, wherein the clamping pieces and the pedestal are integrated into a whole.
 16. The method for processing the fin heat sink according to claim 11, wherein the clamping pieces and the pedestal are separable; the pedestal is provided with grooves; and roots of the clamping pieces are connected with the pedestal through the grooves.
 17. The method for processing the fin heat sink according to claim 11, wherein the clamping grooves are provided with clamps through stamping molding; and the clamps are in tight fit with the clamping pieces.
 18. The method for processing the fin heat sink according to claim 11, wherein fastening pieces are stamped and molded in sleeved positions of the cooling fins and the heat pipe and sleeved with the heat pipe.
 19. The method for processing the fin heat sink according to any one of claims 11 to 18, wherein the cooling fins are provided with bending parts by stamping. 